Briefly compare among the frp, aluminum and steel material in four factors:

1 Raw material cost: The market prices of different materials will directly affect the construction cost of ships. Steel, as a traditional hull material, has high strength and stability, but it is heavy and increases fuel consumption. Aluminum alloy can reduce the weight of ships and reduce fuel consumption due to its lightweight characteristics, but the material cost is higher than steel. Fiberglass (FRP) materials have good corrosion resistance and do not require as frequent maintenance as steel, but their initial construction cost is relatively high.

2 Processing difficulty: Aluminum alloys and fiberglass may require special techniques and processes during processing, which will increase the construction cost. The initial construction cost of aluminum alloys may be higher than that of traditional steel, but in the long run, the fuel efficiency advantages brought by lightweighting may compensate for this part of the cost.

3 Maintenance costs: FRP ships have lower maintenance costs due to their corrosion resistance. Aluminum alloy ships, although corrosion-resistant, may require regular inspections to prevent fatigue damage. Steel ships may face higher maintenance costs, especially for anti-corrosion treatments.

4 Service life: Aluminum and fiberglass vessels generally have a long service life, which can spread their higher initial investment costs. Steel vessels, while durable, may require more frequent repairs and replacements due to corrosion problems.